10 9 6 2 1 Ic(mA) 110 μA 100 μA 90 μA 15 80 μA 70 MA 60 μA 50 μA 20 40 μA 30 μA In-OGN 5 10 25 30 VCE (V) FIG. 121 Problem 2 Given the BJT transistor characteristics of Fig. 121: a. Draw a load line on the characteristics determined by E= 21 V and Rc = 3 kn for a fixed-bias configuration. b. Choose an operating point midway between cutoff and saturation. Determine the value of Rg to establish the resulting operating point. c. What are the resulting values of Ic, and VCE? d. What is the value of B at the operating point? e. What is the value of a defined by the operating point? f. What is the saturation current (Ic) for the design? g. Sketch the resulting fixed-bias configuration. h. What is the de power dissipated by the device at the operating point? i. What is the power supplied by Vcc? j. Determine the power dissipated by the resistive elements by taking the difference between the results of parts (h) and (i). 10A
Power Amplifier
The power amplifier is an electronic amplifier designed to maximize the signal strength of a given input. The input signal strength is enhanced to a high enough level to drive output devices such as speakers, headphones, RF (Radio frequency) transmitters, etc. Unlike voltage / current amplifiers, the power amplifier is designed to drive core loads directly and is used as a storage block in the amplifier series.
Maximum Efficiency Criterion
In every field of engineering, there is a tremendous use of the machine and all those machines are equipped for their popular work efficiency so it very much important for operation engineers to monitor the efficiency of the machine, planning engineers to check out the efficiency of the machine before installing the machine and design engineers to design machine for higher efficiency than and then the utility will procure their products that will ultimately lead to profit and loss of the company. It indicates the importance of efficiency right from the initial stage as manufacturing units, intermediate stage as planning coordinators, and end-users stage as a utility.
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